Dynamic Routing Guide

DRO Glossary

Access Control List (ACL)
  A portal configuration you can use to filter out messages based on a variety of criteria.

forwarding cost
  A value assigned to a portal to help determine best-path routing selection.

UM Router keepalive
  Control messages exchanged between DROs to confirm that DROs are still running.

Interest Message
  Control messages exchanged between DROs to confirm that DROs are still running.

Originating Transport ID (OTID)
  Unique identifier of a message's transport session at the originating source.

portal
  A TCP/IP interface (socket) on a DRO through which the DRO passes data. Endpoint portals interface TRDs, and peer portals interface peer portals of other DROs.

Topic Resolution Domain (TRD)
  The realm of UDP multicast or unicast connectivity that allows UM topic resolution to occur. Blocking of this UDP connectivity (for example, by a firewall or a restrictive WAN link) defines a TRD's boundaries. Contexts within a TRD must have the same topic resolution configuration option settings (multicast group IP address/port and resolver interface full or CIDR address).

Use Query
  A periodic control message distributed to all members of a TRD to verify the continued presence of receivers for a given topic or pattern.

web monitor
  A web-based real-time DRO statistics and configuration display.